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std::unique...get_deleter(3)   C++ Standard Libary  std::unique...get_deleter(3)

NAME
     std::unique_ptr::get_deleter - std::unique_ptr::get_deleter

Synopsis
	Deleter& get_deleter() noexcept;	      (since C++11)
						      (constexpr since C++23)
	const Deleter& get_deleter() const noexcept;  (since C++11)
						      (constexpr since C++23)

	Returns  the  deleter  object which would be used for destruction of the
     managed
	object.

Parameters
	(none)

Return value
	The stored deleter object.

Example
     // Run this code

      #include <iostream>
      #include <memory>

      struct Foo
      {
	  Foo() { std::cout << "Foo() 0x" << std::hex << (void*)this << '\n'; }
	  ~Foo() { std::cout << "~Foo() 0x" << std::hex << (void*)this <<  '\n';
     }
      };

      struct D
      {
	  int number;

	  void bar()
	  {
	      std::cout << "call D::bar(), my number is: " << std::dec << number
     << '\n';
	  }

	  void operator()(Foo* p) const
	  {
	      std::cout  <<  "call  deleter  for  Foo  object 0x" << std::hex <<
     (void*)p << '\n';
	      delete p;
	  }
      };

      int main()
      {
	  std::cout << "main start\n";

	  std::unique_ptr<Foo, D> up1(new Foo(), D(42));
	  D& del1 = up1.get_deleter();
	  del1.bar();

	  std::unique_ptr<Foo, D> up2(new Foo(), D(43));
	  D& del2 = up2.get_deleter();
	  auto* released = up2.release();
	  del2(released);

	  std::cout << "main end\n";
      }

Output:
      main start
      Foo() 0x0x90cc30
      call D::bar(), my number is: 42
      Foo() 0x0x90cc50
      call deleter for Foo object 0x0x90cc50
      ~Foo() 0x0x90cc50
      main end
      call deleter for Foo object 0x0x90cc30
      ~Foo() 0x0x90cc30

See also
	get_deleter returns the deleter of specified type, if owned
		    (function template)

http://cppreference.com 	   2024.06.10	    std::unique...get_deleter(3)
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